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Add 18/80 and 15/28

18/80 + 15/28 is 213/280.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 28 is 560
  2. For the 1st fraction, since 80 × 7 = 560,
    18/80 = 18 × 7/80 × 7 = 126/560
  3. Likewise, for the 2nd fraction, since 28 × 20 = 560,
    15/28 = 15 × 20/28 × 20 = 300/560
  4. Add the two fractions:
    126/560 + 300/560 = 126 + 300/560 = 426/560
  5. 426/560 simplified gives 213/280
  6. So, 18/80 + 15/28 = 213/280

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